KVM switch system and interface adapter for detecting interface of computer

Abstract

A keyboard-video-mouse (KVM) switch system capable of detecting an interface of a computer and an interface adapter used therefor are provided. The KVM switch system includes a computer connector, a processor, and a detecting link. The computer connector is coupled to a computer. The processor is coupled to the computer connector with the detecting link connected therebetween. The processor outputs a first signal to the computer via the computer connector when the processor detects that the detecting link provides a first level and outputs a second signal when the interface adapter is connected between the computer connector and the computer, therefore, the processor detects that the detecting link and the computer provide a second level. The interface adapter has a PS/2 interface and a USB interface. A reserved pin of the PS/2 interface is connected to a power pin of the USB interface.

1 . A keyboard-video-mouse (KVM) switch system, comprising:
 a computer connector, coupled to a computer, having at least one detecting pin;   a processor, coupled to the computer connector; and   a detecting link connecting between the detecting pin and the processor, wherein the processor outputs a first signal to the computer via the computer connector when the processor detects that the detecting link provides a first level.   
   
   
       2 . The KVM switch system according to  claim 1 , wherein the processor outputs a second signal to the computer via the computer connector when the processor detects that the detecting link and the computer provide a second level. 
   
   
       3 . The KVM switch system according to  claim 2 , wherein the processor detects that the detecting link is at the second level when an interface adapter is coupled between the computer connector and the computer. 
   
   
       4 . The KVM switch system according to  claim 2 , wherein the detecting link is at the first level or at the second level depending on a voltage level of the detecting pin. 
   
   
       5 . The KVM switch system according to  claim 2 , further comprising a selector coupling the computer connector and the detecting link to the processor, wherein the processor enables the selector to output the first signal or the second signal to the computer. 
   
   
       6 . The KVM switch system according to  claim 2 , wherein signal lines of the first signal and signal lines of the second signal are connected in a tap form and the processor determines to output the first signal or the second signal to the computer. 
   
   
       7 . The KVM switch system according to  claim 3 , wherein the interface adapter comprises:
 a PS/2 interface, having a reserved pin;   a USB interface, having a power pin connected to the reserved pin.   
   
   
       8 . The KVM switch system according to  claim 7 , wherein the power pin of the USB interface is a V bus 0 pin. 
   
   
       9 . The KVM switch system according to  claim 7 , wherein the power pin of the USB interface is a ground pin. 
   
   
       10 . The KVM switch system according to  claim 3 , further comprising a cable coupled between the computer connector and the interface adapter. 
   
   
       11 . The KVM switch system according to  claim 10 , wherein the cable comprises:
 a KVM connector, coupled to the computer connector; and   a set of computer signal connectors, having a video signal connector and at least one peripheral signal connector, coupled to the computer and the interface adapter.   
   
   
       12 . The KVM switch system according to  claim 10 , wherein the cable comprises:
 a set of KVM connectors, having a video signal connector and at least one peripheral signal connectors, coupled to the computer connector; and   a set of computer signal connectors, having another video signal connector and at least another peripheral signal connector, coupled to the computer and the interface adapter.   
   
   
       13 . The KVM switch system according to  claim 1 , further comprising a cable coupled between the KVM switch system and the computer. 
   
   
       14 . The KVM switch system according to  claim 13 , wherein the cable comprises:
 a KVM connector, coupled to the computer connector; and   a set of computer signal connectors, having a video signal connector and at least one peripheral signal connector, coupled to the computer.   
   
   
       15 . The KVM switch system according to  claim 13 , wherein the cable comprises:
 a set of KVM connectors, having a video signal connector and at least one peripheral signal connectors, coupled to the computer connector; and   a set of computer signal connectors, having another video signal connector and at least another peripheral signal, coupled to the computer.   
   
   
       16 . An interface adapter for coupling a computer connector of a keyboard-video-mouse (KVM) switch system to a computer, wherein a processor of the KVM switch system outputs a first signal to the computer via the computer connector when the processor detects that a detecting link of the KVM switch system is at a first level, the interface adapter comprising:
 a PS/2 interface, having a reserved pin; and   a USB interface, having a power pin connected to the reserved pin for providing a voltage level to the detecting link of the KVM switch system through a detecting pin of the computer connector,   wherein the processor outputs a second signal to the computer when the interface adapter is coupled between the computer connector and the computer, and the processor detects that the detecting link is at a second level   
   
   
       17 . The interface adapter according to  claim 16 , wherein the detecting link is at the first level or at the second level depending on the voltage level provided by the USB interface. 
   
   
       18 . The interface adapter according to  claim 16 , wherein the voltage level is generated by the computer. 
   
   
       19 . The interface adapter according to  claim 16 , wherein the power pin of the USB interface is a V bus  pin. 
   
   
       20 . The interface adapter according to  claim 16 , wherein the power pin of the USB interface is a ground pin.